Service & Parts Manual (2019, 2020, 2021, 2022)

197 PB
INSTALLATION
24 and 36k Outdoor Units
Piping Work and Regerant Charge
eed
An oil trap should be used every 16 ft
Slope：1/200~1/250
Slope：1/200~1/250
OOil trap
MMAX. lenggth allow
Outdoor unit
Pipe length A
Refrigerant Additional Charge
The unit has been filled with refrigerant, but if L (total pipe length) exceeds standard length, additional refrigerant (R410A) change is
required.
For 24K: Additional refrigerant charge=[L-74-4/5(22.8m) ]× 0.807oz/5ft (15g/m)
For 36K: Additional refrigerant charge=[L-98-3/7(30m) ]× 0.807oz/5ft (15g/m)
Pipe length D
Height D
Height E
A
B
C
Indoor unit
D
Note:
Indoor unit D in the circle is only valid for 36K model.
Model 24K 36K
Max. Length Between Indoor Unit
and Outdoor Unit
ft./m
A≤ 65.6(20)
B≤ 65.6(20)
C ≤ 65.6(20)
A≤ 65.6(20)
B≤ 65.6(20)
C ≤ 65.6(20)
D≤ 65.6(20)
Max. Length Between Indoor Unit
and Outdoor Unit (Total)
ft./m
A+B+C ≤
197(60)
A+B+C+D ≤
246(75)
Max. Height Between Indoor Unit
and Outdoor Unit
ft./m D≤ 49(15)
D≤ 49(15)
Max. Height Between Indoor Units ft./m E ≤ 25(7.5) E ≤ 25(7.5)
When the indoor unit is lower than the outdoor unit, and the height
is larger than 16 feet, an oil bend should be employed for every 16 feet.
NOTE:
1. To avoid storing too much oil in the oil bend, the oil bend should be as short as possible.
2. The horizontal piping should be sloped down along the refrigerant ow direction, to bring the oil back to compressor. The
slope should be between 1/200 and 1/250.
In order to ensure cooling/ heating performance better, the refrigerant piping should be as short and straight as possible.